Ответ:

1 has destroyed

2 has just arrived

3 has joined

4 has helped

5 haven't occured

6 has collapsed

7 has never been

8 have come

9 hasn't been

10 has survived

1 Where have you worked as a volunteer?

2 How has the tornado stopped?

3 Why have we moved to the country since spring?

4 What has destroyed the town?

5 Where have the villagers come from?

6 What have the voluteers cleared?